9×21mm
| 9×21mm | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
9×21mm (left) and parent 9×19mm Parabellum (right) cartridges | ||||||||||||
| Type | Pistol | |||||||||||
| Place of origin | Italy Israel | |||||||||||
| Production history | ||||||||||||
| Designer | Franco Benvenuti Agency (Italy) and Israel Military Industries (IMI) | |||||||||||
| Produced | 1980–present | |||||||||||
| Specifications | ||||||||||||
| Parent case | 9×19mm Parabellum | |||||||||||
| Case type | Rimless, straight | |||||||||||
| Bullet diameter | 9.03 mm (0.356 in) | |||||||||||
| Land diameter | 8.79 mm (0.346 in) | |||||||||||
| Neck diameter | 9.63 mm (0.379 in) | |||||||||||
| Base diameter | 9.93 mm (0.391 in) | |||||||||||
| Rim diameter | 9.96 mm (0.392 in) | |||||||||||
| Rim thickness | 1.27 mm (0.050 in) | |||||||||||
| Case length | 21.15 mm (0.833 in) | |||||||||||
| Overall length | 29.75 mm (1.171 in) | |||||||||||
| Case capacity | 1.01 cm3 (15.6 gr H2O) | |||||||||||
| Rifling twist | 254 mm (1 in 10 in) | |||||||||||
| Primer type | Small pistol | |||||||||||
| Maximum pressure | 235.00 MPa (34,084 psi) | |||||||||||
| Ballistic performance | ||||||||||||
| ||||||||||||
| Source(s): C.I.P. | ||||||||||||
The 9×21mm pistol cartridge (also known as the 9×21mm GP, 9×21mm IMI, 9mm IMI, 9×21mm Italian, or 9mm Italian) was designed by Jager (Loano, Italy), then adopted and commercialised by Israel Military Industries for those jurisdictions where military service cartridges, like the 9×19mm Parabellum, are or were illegal for civilian purchase (i.e. Italy, France, Brazil, and Mexico).